The mechanism of dorsal fracture dislocation of the fifth carpometacarpal joint. 1979

M Lilling, and H Weinberg

Fracture dislocation at the base of the fifth metacarpal is a rare injury. Fewer than 25 cases have been published in the English-language literature. A force acting along the longitudinal axis of the fifth metacarpal causes a fracture dislocation at the base of the bone in a dorsal-ulnar direction, because of the anatomy of the joint and the mechanical properties of the bone and the intermetacarpal ligament. The mechanism of other types of injury to this joint, namely dorsal-radial or palmar-radial dislocation of the base of the fifth metacarpal is different. A case is presented which demonstrates the mechanism of the fracture dislocation.

UI MeSH Term Description Entries
D008022 Ligaments Shiny, flexible bands of fibrous tissue connecting together articular extremities of bones. They are pliant, tough, and inextensile. Interosseal Ligament,Interosseous Ligament,Interosseal Ligaments,Interosseous Ligaments,Ligament,Ligament, Interosseal,Ligament, Interosseous
D008297 Male Males
D004204 Joint Dislocations Displacement of bones from their normal positions at a joint. Inferior Dislocation,Joint Subluxations,Luxatio Erecta,Dislocation, Joint,Dislocations, Joint,Inferior Dislocations,Joint Dislocation,Joint Subluxation,Subluxation, Joint,Subluxations, Joint
D005383 Finger Injuries General or unspecified injuries involving the fingers. Injuries, Finger,Finger Injury,Injury, Finger
D005384 Finger Joint The articulation between the head of one phalanx and the base of the one distal to it, in each finger. Interphalangeal Joint of Hand,Interphalangeal Joint of Finger,Finger Interphalangeal Joint,Finger Interphalangeal Joints,Finger Joints,Hand Interphalangeal Joint,Hand Interphalangeal Joints,Joint, Finger,Joints, Finger
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D013314 Stress, Mechanical A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area. Mechanical Stress,Mechanical Stresses,Stresses, Mechanical
D050723 Fractures, Bone Breaks in bones. Bone Fractures,Broken Bones,Spiral Fractures,Torsion Fractures,Bone Fracture,Bone, Broken,Bones, Broken,Broken Bone,Fracture, Bone,Fracture, Spiral,Fracture, Torsion,Fractures, Spiral,Fractures, Torsion,Spiral Fracture,Torsion Fracture

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